CN213958791U

CN213958791U - High-reliability capacitor sealing terminal structure

Info

Publication number: CN213958791U
Application number: CN202023202248.6U
Authority: CN
Inventors: 张勇; 汪威; 汪成功; 胡杰; 吴伟伟
Original assignee: Anhui Tongfeng Electronics Co Ltd
Current assignee: Anhui Tongfeng Electronics Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-08-13
Anticipated expiration: 2030-12-25

Abstract

The utility model belongs to the technical field of the condenser, concretely relates to condenser sealing terminal structure of high reliability. Including conductive screw, installation panel, go up insulating position sleeve, lower insulating position sleeve, fastener, first sealing member, second sealing member, third sealing member and fourth sealing member, conductive screw includes screw rod section and spacing platform, insulating position sleeve, installation panel, lower insulating position sleeve overlap in proper order and locate conductive screw, and the installation panel is located insulating position sleeve and between the lower insulating position sleeve, the fastener cover is located conductive screw and is located the top of insulating position sleeve, first sealing member, second sealing member, third sealing member and fourth sealing member combined action realize on the installation panel and the sealed effect of twice under the installation panel. The utility model has the advantages of simple structure, the poor problem of the sealed effect of condenser that has solved prior art existence.

Description

High-reliability capacitor sealing terminal structure

Technical Field

The utility model belongs to the technical field of the condenser, concretely relates to condenser sealing terminal structure of high reliability.

Background

In the rail transit industry, the demand for power electronic capacitors is increasing. Because the working environment of the used capacitor has a large vibration condition, the oil-immersed capacitor in the current market can aggravate the aging of a sealing element in the terminal along with the increase of the service time, so that the sealing performance of the sealing element is reduced, an internal filling medium is leaked, and the oil-immersed capacitor is particularly more obviously embodied in the capacitor with an oil structure. The oil leak can pollute the outward appearance of condenser more than can, also can produce the conflagration hidden danger simultaneously, and the oil leak is too much still can make the inside heat-conducting medium of condenser reduce, and the condenser during operation heat can't in time be derived, has reduced its life and reliability.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problem that the oil leak condition is produced to the condenser after using for a long time among the prior art, the utility model provides a condenser sealing terminal structure of high reliability can be applied to various flat structures, and convenient to use does not have and reveals the risk.

In order to solve the technical problem of the utility model, the technical scheme who takes does, a condenser sealing terminal structure of high reliability, including electrically conductive screw rod, installation panel, go up insulating position sleeve, lower insulating position sleeve, fastener, electrically conductive screw rod includes screw rod section and the spacing platform that from the top down diameter increases in proper order, insulating position sleeve, installation panel and last insulating position sleeve are established in proper order on the screw rod section down, the fastener cover is located electrically conductive screw rod and is located the top of insulating position sleeve, still includes first sealing member, the upper end of going up insulating position sleeve passes through the sealed cooperation of first sealing member with the contact surface of screw rod section.

As a further improvement of the above-described high-reliability capacitor hermetic terminal structure:

preferably, the fastening piece comprises a fastening nut, a metal elastic cushion and a compression gasket which are sleeved on the conductive screw rod in sequence from top to bottom.

Preferably, the first sealing element comprises a sealing groove formed in the contact surface of the upper insulating positioning sleeve and the screw section and a sealing ring arranged in the sealing groove.

Preferably, the mounting structure further comprises a second sealing element, wherein the second sealing element is sleeved on the conductive screw rod and is positioned in a contact surface between the upper insulating positioning sleeve and the mounting panel.

Preferably, the mounting structure further comprises a third sealing element, wherein the third sealing element is sleeved on the conductive screw rod and is positioned in a contact surface between the lower insulation positioning sleeve and the mounting panel.

Preferably, the electric screw further comprises a fourth sealing element, and the fourth sealing element is sleeved on the electric screw and is positioned in a contact surface between the lower insulating positioning sleeve and the limiting platform.

Preferably, the connecting surfaces of the upper insulating locating sleeve and the lower insulating locating sleeve are arranged into concave-convex structures which are matched with each other.

The utility model discloses compare prior art's beneficial effect and lie in:

1) the utility model provides a condenser sealing terminal structure of high reliability improves current condenser sealing terminal structure, is provided with first sealing member between fastener and last insulating position sleeve, can improve the sealing performance of terminal, effectively prevents the condenser oil leak.

2) In the use, because the heating and the vibration environment of electrically conductive platform can make the fastening force of going up insulating position sleeve and insulating position sleeve down decline to some extent. The fastener includes from the top down including the fastening nut, the metal bullet pad of overlapping in proper order on the conductive screw and compress tightly the gasket, and the moment of torsion that fastening nut can be maintained effectively to metal bullet pad and compress tightly the gasket, prevents not hard up sealed effect of influence.

3) A fourth sealing element is arranged on the contact surface of the lower insulating positioning sleeve and the limiting platform in the conductive screw, a third sealing element is arranged on the contact surface of the lower insulating positioning sleeve and the mounting panel, and the fourth sealing element and the third sealing element are matched to realize the first sealing effect at two matching gaps which are possibly subjected to oil leakage in the lower capacitor of the mounting panel; set up the second sealing member at the contact surface of last insulating position sleeve and installation panel, insulating position sleeve sets up the third sealing member mating reaction with the contact surface of installation panel down, can realize the sealed effect of second of two cooperation gaps departments in installation panel top.

4) Under the different operating condition of condenser, the condition of higher voltage can appear, go up the connection face of insulating position sleeve and insulating position sleeve down and set up to the concave-convex structure of mutually supporting, can increase creepage distance, prevent to take place the breakdown phenomenon from insulating terminal is inside, prevent to go up insulating position sleeve and insulating position sleeve down and rotate the wearing and tearing to the sealing washer on the installation panel, interlock each other when the assembly, also can fix the axle center unanimity.

Drawings

Fig. 1 is a structure diagram of a high-reliability capacitor sealing terminal of the present invention;

1. a conductive screw; 11. a screw section; 12. a limiting platform; 2. installing a panel; 3. an upper insulation positioning sleeve; 4. a lower insulating positioning sleeve; 5. a fastener; 51. fastening a nut; 52. a metal spring pad; 53. compressing the gasket; 6. a first seal member; 7. a second seal member; 8. a third seal member; 9. and a fourth seal.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following description, in conjunction with the accompanying drawings and embodiments, will be further detailed, and all other embodiments obtained by those skilled in the art without creative work belong to the scope of the present invention.

Example 1

As shown in fig. 1, a high-reliability capacitor sealing terminal structure, includes conductive screw 1, installation panel 2, upper insulation positioning sleeve 3, lower insulation positioning sleeve 4, fastener 5 and first sealing member 6, conductive screw 1 includes screw section 11 and limiting platform 12 that the diameter increases from top to bottom in proper order, lower insulation positioning sleeve 4 is located conductive screw 1 is last and is located between conductive screw 1's limiting platform 12 and installation panel 2, upper insulation positioning sleeve 3 is located conductive screw 1 is last and is located the top of installation panel 2, fastener 5 is located conductive screw 1 is last and is located the top of upper insulation positioning sleeve 3, first sealing member 6 is located conductive screw 1 is last and is located between fastener 5 and upper insulation positioning sleeve 3. The fastening piece 5 comprises a fastening nut 51, a metal elastic cushion 52 and a compression gasket 53 which are sleeved on the conductive screw rod 1 in sequence from top to bottom, and the first sealing piece 6 is positioned between the compression gasket 53 and the upper insulating positioning sleeve 3. The first sealing element 6 comprises a sealing groove formed on the contact surface between the upper end of the upper insulating positioning sleeve 3 and the conductive screw rod 1 and a sealing ring arranged in the sealing groove.

The terminal structure further comprises a second sealing element sleeve 7, a third sealing element 8 and a fourth sealing element 9, wherein the second sealing element 7 is sleeved on the conductive screw rod 1 and is positioned between the upper insulation positioning sleeve 3 and the mounting panel 2; the third sealing element 8 is sleeved on the conductive screw rod 1 and positioned between the lower insulating positioning sleeve 4 and the mounting panel 2; the fourth sealing element 9 is sleeved on the conductive screw rod 1 and is positioned between the lower insulating positioning sleeve 4 and the limiting platform 12; the connecting surfaces of the upper insulating locating sleeve 3 and the lower insulating locating sleeve 4 are arranged into concave-convex structures which are matched with each other, and the concave-convex structures are mutually meshed during assembly and can also be fixed to be consistent in axis center.

Example 2

The function state of the capacitor sealing terminal structure of the present invention with high reliability is described below with reference to fig. 1:

after the capacitor sealed terminal structure is assembled, the fastening nut 51 rotates downwards and pushes the metal elastic pad 52 and the compression gasket 53 to compress the sealing ring in the first sealing element 6, so that the contact surfaces of the compression gasket 53 and the upper insulating positioning sleeve 3 are well sealed; meanwhile, pressure is transmitted to the upper insulating positioning sleeve 3, under the relative extrusion between the limiting platform 12 and the insulating positioning sleeve 3, the upper insulating positioning sleeve 3 and the mounting panel 2 are sealed under the action of a second sealing element 7, the lower insulating positioning sleeve 4 and the mounting panel 2 are sealed under the action of a third sealing element 8, and the lower insulating positioning sleeve 4 and the limiting platform 12 are sealed under the action of a fourth sealing element 9;

when a plurality of capacitors are connected together for use, if the locking force is reduced due to vibration or material stress, the locking force can be adjusted by tightening the fastening nut 51 at any time, thereby ensuring the sealing effect of the capacitors.

It will be appreciated by those of ordinary skill in the art that the foregoing is merely illustrative of several embodiments of the present invention and is not an exhaustive list. It should be noted that many variations and modifications are possible to those skilled in the art, and all variations and modifications that do not depart from the scope of the invention as set forth in the claims should be deemed to be a part of the disclosure.

Claims

1. The utility model provides a condenser sealing terminal structure of high reliability, its characterized in that includes conductive screw (1), installation panel (2), goes up insulating position sleeve (3), lower insulating position sleeve (4), fastener (5), conductive screw (1) includes screw rod section (11) and spacing platform (12) that the diameter increases in proper order from the top down, establish on screw rod section (11) in proper order insulating position sleeve (4), installation panel (2) and last insulating position sleeve (3) down, fastener (5) cover are located conductive screw (1) and are located the top of insulating position sleeve (3), still include first sealing member (6), the upper end of going up insulating position sleeve (3) and the contact surface of screw rod section (11) are through first sealing member (6) sealed cooperation.

2. The sealed terminal structure of high reliability capacitor as claimed in claim 1, wherein the fastening member (5) comprises a fastening nut (51), a metal elastic pad (52) and a pressing washer (53) which are sequentially sleeved on the conductive screw (1) from top to bottom.

3. A high-reliability capacitor seal terminal structure according to claim 1 or 2, wherein the first seal member (6) comprises a seal groove formed at the contact surface of the upper insulating positioning sleeve (3) and the screw section (11) and a seal ring arranged in the seal groove.

4. The structure of claim 1, further comprising a second sealing member (7), wherein the second sealing member (7) is sleeved on the conductive screw (1) and located in a contact surface between the upper insulation positioning sleeve (3) and the mounting panel (2).

5. The sealed terminal structure of the capacitor with high reliability as claimed in claim 1, further comprising a third sealing member (8), wherein the third sealing member (8) is sleeved on the conductive screw rod (1) and is located in the contact surface of the lower insulation positioning sleeve (4) and the mounting panel (2).

6. The high-reliability capacitor sealing terminal structure according to claim 1, further comprising a fourth sealing member (9), wherein the fourth sealing member (9) is sleeved on the conductive screw (1) and is located in a contact surface between the lower insulation positioning sleeve (4) and the limiting platform (12).

7. A high-reliability capacitor hermetic terminal structure as claimed in claim 1, wherein the connecting faces of the upper insulating positioning sleeve (3) and the lower insulating positioning sleeve (4) are configured as a concave-convex structure which are engaged with each other.